Event Title

Comparison of Load Carrying Capacity of Three and Four Lobed Polygonal Shaft and Hub Connection for Constant Grinding Diameter

Location

Hager-Lubbers Exhibition Hall

Start Date

19-4-2016 3:30 PM

Description

Polygonal shafts are used for torque transmission via pulleys and gears. The purpose of this research is to compare the load carrying capacity of three (P3G) and four (P4C) lobed polygonal shafts and hub connections manufactured from the same outer diameter. The P3G and P4C shaft and hub have been compared for interference, line to line and clearance fit. The conformal contact between the shaft and the hub in polygonal profile makes it difficult to design them analytically. With the advancement of numerical analysis as Finite Element Analysis, these issues can be addressed, making polygonal shafts a viable competitor to keyed and splined shafts. The loading strength of the polygonal shaft and hub connection has been analyzed using Finite element Analysis software, ANSYS®, by subjecting the connection to torsional bending load from a spur gear of 20° pressure angle. From the analysis, it was found that the hub experienced greater stress than the shaft in all cases. The stresses were higher in P4C shaft than P3G shaft. The clearance fit was found to be the most detrimental fit and interference fit to be the most suitable for larger power transmission. Owing to its small normal axial stress and hub displacement, the P4C clearance fit has its use in low power transmission where sliding fit is a requirement. For general purpose, P3G interference fit is recommended.

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Apr 19th, 3:30 PM

Comparison of Load Carrying Capacity of Three and Four Lobed Polygonal Shaft and Hub Connection for Constant Grinding Diameter

Hager-Lubbers Exhibition Hall

Polygonal shafts are used for torque transmission via pulleys and gears. The purpose of this research is to compare the load carrying capacity of three (P3G) and four (P4C) lobed polygonal shafts and hub connections manufactured from the same outer diameter. The P3G and P4C shaft and hub have been compared for interference, line to line and clearance fit. The conformal contact between the shaft and the hub in polygonal profile makes it difficult to design them analytically. With the advancement of numerical analysis as Finite Element Analysis, these issues can be addressed, making polygonal shafts a viable competitor to keyed and splined shafts. The loading strength of the polygonal shaft and hub connection has been analyzed using Finite element Analysis software, ANSYS®, by subjecting the connection to torsional bending load from a spur gear of 20° pressure angle. From the analysis, it was found that the hub experienced greater stress than the shaft in all cases. The stresses were higher in P4C shaft than P3G shaft. The clearance fit was found to be the most detrimental fit and interference fit to be the most suitable for larger power transmission. Owing to its small normal axial stress and hub displacement, the P4C clearance fit has its use in low power transmission where sliding fit is a requirement. For general purpose, P3G interference fit is recommended.